1. Place cauliflower in a large saucepan; steam, covered, 20 minutes or until very tender. Drain.
2. Melt butter in same pan over medium-low heat. Add garlic, and cook 2 minutes or until lightly browned. Stir in cauliflower, milk, and remaining ingredients.
3. Place cauliflower mixture in a blender or food processor; process until smooth.